CN107445321A - A kind of double microprocessor techniques for being used to handle oil field extracted water - Google Patents
A kind of double microprocessor techniques for being used to handle oil field extracted water Download PDFInfo
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- CN107445321A CN107445321A CN201710753285.XA CN201710753285A CN107445321A CN 107445321 A CN107445321 A CN 107445321A CN 201710753285 A CN201710753285 A CN 201710753285A CN 107445321 A CN107445321 A CN 107445321A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000000706 filtrate Substances 0.000 claims abstract description 25
- 238000012545 processing Methods 0.000 claims abstract description 20
- 238000005188 flotation Methods 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 16
- 238000003908 quality control method Methods 0.000 claims abstract description 14
- 239000010865 sewage Substances 0.000 claims abstract description 14
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000008929 regeneration Effects 0.000 claims abstract description 13
- 238000011069 regeneration method Methods 0.000 claims abstract description 13
- 230000035699 permeability Effects 0.000 claims abstract description 10
- 238000011001 backwashing Methods 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims description 29
- 238000001471 micro-filtration Methods 0.000 claims description 27
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 238000005524 ceramic coating Methods 0.000 claims description 10
- 239000010802 sludge Substances 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000004062 sedimentation Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 230000003139 buffering effect Effects 0.000 claims description 4
- 239000000839 emulsion Substances 0.000 claims description 4
- 239000008187 granular material Substances 0.000 claims description 4
- 230000014759 maintenance of location Effects 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 4
- 238000001179 sorption measurement Methods 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 230000008439 repair process Effects 0.000 claims description 3
- 238000012958 reprocessing Methods 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- 238000007667 floating Methods 0.000 claims description 2
- 238000010348 incorporation Methods 0.000 claims description 2
- 230000000717 retained effect Effects 0.000 claims 1
- 239000003921 oil Substances 0.000 description 71
- 239000007787 solid Substances 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000006004 Quartz sand Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000009287 sand filtration Methods 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 241000758789 Juglans Species 0.000 description 2
- 235000009496 Juglans regia Nutrition 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000008213 purified water Substances 0.000 description 2
- 235000020234 walnut Nutrition 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 238000011049 filling Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000002332 oil field water Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
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- 239000002351 wastewater Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The present invention relates to a kind of double microprocessor techniques for being used to handle oil field extracted water.Mainly solve the problems, such as it is existing have been able to reach handling process existing for the handling process of oil field low-permeability oil reservoir reinjected water Water Quality Control Indexes requirement is complex, water quality treatment can not stably reaching standard.It is characterized in that：Comprise the following steps：（1）Oil-containing recovered water enters cyclone air-flotation in a subtle way and selects device to carry out water-oil separating；（2）Water outlet after the processing of micro- cyclone gas floatation device enters back into surge tank 1 and microfilter device, and the water outlet of microfilter device enters outer water delivery tank after reaching oil field reinjection water Water Quality Control Indexes requirement；（3）The boosted filtrate in microfilter device after a filter cycle of water in outer water delivery tank carries out backwash regeneration；（4）The backwashing sewage water of microfilter device discharge sequentially enters surge tank 2, micro- cyclone gas floatation device is reprocessed.The technique can reach oil field low-permeability or Extra-low permeability oil reservoir reinjected water Water Quality Control Indexes requirement.
Description
Technical field
The present invention relates to Treatment Techniques of Extracted Water from Crude Oil Production field, more particularly to a kind of it is used to handle the double micro- of oil field extracted water
Handling process.
Background technology
Current existing Treatment Techniques of Extracted Water from Crude Oil Production, oil removing and removal portion are carried out using gravity type settling tank or air supporting choosing
Divide suspended solid, its water outlet meets the influent quality of subsequent filter requirement；Then reached again through the granular filtering material filter filtering of particle
The different permeability oil reservoir reinjected water Water Quality Control Indexes required to oil field.Finally going out after current built extremely typical processing
Water can reach oil field low-permeability or the handling process technology of Extra-low permeability oil reservoir reinjected water Water Quality Control Indexes requirement is：
Gravity type settling tank → air supporting choosing → microorganism → one-level double-layer filter material filtering → two level double-layer filter material filtering → ceramic membrane is fine
Filtering → purified water.
Handling process is complex, it is necessary to will can contain by 6 sections of processing equipment as a whole for this technology
Oily sewage disposal is up to standard, that is, reaches oil field low-permeability or Extra-low permeability oil reservoir reinjected water Water Quality Control Indexes requirement.Thus
The floor space brought is big, operating cost is high, and caused accessory substance residual active sludge is difficult that processing reaches after microbiological treatment
The requirement of environmental protection, and ceramic membrane its flux decline after prolonged operation is very fast, and the regeneration of film also needs to periodically
Chemical regeneration is carried out so as to increase processing equipment and complicated technique, and acid-base waste fluid follows in system caused by regenerative process
Ring processing will influence the water quality reaching standard of whole system processing.
In addition, the processing equipment of the treatment effeciency relative efficiency of the vertical settling tank used in above-mentioned handling process is low, sets
Standby volume is big and floor space is big；Also it is exactly to contain chemical oil displacement agent in latter period of oilfield development water so that after water-oil separating
Oil-containing extraction water emulsification degree it is high, oil droplet particle is tiny and oil droplet buoyance lift speed is slow etc., realized using single physical method
The profit sedimentation separation of extraction oil-polluted water is extremely difficult to expected effect and purpose, and thereby produces the discomfort of processing equipment
Should, so as to cause complex treatment process and construction investment increase；It is main using individual layer quartz filter and double in terms of filtering
Layer filtering material filter, also has using filters such as walnut shell and fiber-ball filter medias at present in terms of water drive processing, but also appearance pair
Extraction aqueous nature containing chemical oil displacement agent changes inadaptable, and filtrate is easily hardened, and regeneration is difficult low with filtering velocity etc. to ask
The generation of topic.
The content of the invention
The invention reside in overcome existing present in background technology to have been able to reach oil field low-permeability oil reservoir reinjected water
Existing for the handling process of Water Quality Control Indexes requirement handling process is complex, water quality treatment can not stably reaching standard ask
Topic, and a kind of double microprocessor techniques for being used to handle oil field extracted water are provided.Oil field extracted water after the PROCESS FOR TREATMENT can reach
To oil field low-permeability or the requirement of Extra-low permeability oil reservoir reinjected water Water Quality Control Indexes, and before equal treatment effect is reached
Put, processing equipment and technology are advanced, and floor space is small, and operating cost is low.
The present invention, which solves its problem, to be reached by following technical solution：It is a kind of to be used to handle the double micro- of oil field extracted water
Handling process, comprise the following steps：
（1）Processed oil-containing recovered water is lifted into micro- cyclone gas floatation device by gravity or booster pump and carries out water-oil separating
Except dispersed oil and part oil emulsion and a small amount of granule foreign；
（2）Water outlet after the processing of micro- cyclone gas floatation device enters back into surge tank 1, and the boosted pump 1 of water of surge tank 1 enters in a subtle way
Filter, processed recovered water successively complete the quenched and process of reaction and filtering in microfilter device；Microfiltration fills
The water outlet put enters outer water delivery tank after reaching oil field low-permeability or Extra-low permeability oil reservoir reinjected water Water Quality Control Indexes requirement,
Boosted pump 3 enters water-injection station progress re-injection again；
（3）Step（2）The boosted pump 4 of water in outer water delivery tank is lifted to being loaded in the micro-filtration tank after a filter cycle is completed
Filtrate carry out backwash regeneration, filtrate is recovered original retention and adsorption capacity, then carry out next filter cycle again
Filtering；
（4）Step（3）The backwashing sewage water of the filtrate backwash regeneration discharge of micro-filtration tank filling enters surge tank 2, then boosted
Pump 5 is lifted into the back with water inlet line of micro- cyclone gas floatation device, is entered cyclone air-flotation in a subtle way and is selected device to be reprocessed；
（5）Step（1）Oil slick slag caused by micro- cyclone gas floatation device progress water-oil separating enters oil slick slag ladle, is then lifted through pump
Dehydration reprocessing is carried out into dehydrating plant；The sludge that micro- cyclone gas floatation device bottom sedimentation separation comes out is carried out after being discharged into sludge tank
Concentration, then outward transport Treatment of Sludge station, which does further to handle, reaches innoxious and recycling；
Present invention determine that " micro- cyclone air-flotation → microfilter device → purified water " handling process, be first oil-containing recovered water enter
Micro- cyclone air-flotation device, micro- cyclone air-flotation device are the high-efficient treatment devices for integrating the gentle flotation technology of micro- cyclone technique；
It is that processed oil-containing recovered water is lifted by gravity or booster pump first during the plant running, by pipeline static mixer
（Mainly consider the immixture of medicament and sewage during dosing）, then the back with water inlet line again through micro- cyclone gas floatation device simultaneously with
Microbubble water caused by micro bubble generation device mixes, and tangentially enters cyclone air-flotation in a subtle way and selects in device, and is centrifuged in eddy flow
The aggregation of oil droplet and impurity is carried out under the compound action of power+air supporting buoyancy, is sticked（Microbubble water is released under conditions of pressure reduction
Microbubble is released with oil droplet and suspended solid to stick）, suspended so as to quickly and efficiently realize Centrifugal Flotation separation oil removing and remove
Solid impurity.
The microfilter device is formed by buffering quenched, reaction unit and micro-filtration tank, and microfiltration media therein is using work
Property micropore ceramics plating film filtering material carry out filtration treatment.And active micropore ceramic coating filtrate have larger specific surface area and efficiently
The ability of impurity in absorption effluent, along with deeper filter bed form is used, so that micro-filtration has higher pollutant carrying capacity
Higher filtering accuracy；Active micropore ceramic coating filtrate is regenerated additionally, due to using pulse gas and water joint backwash
And the characteristics of there is favorable regeneration effect and save a large amount of backwashing waters.
It is of the invention to be had the advantages that compared with above-mentioned background technology：It is used to handle oil field using the present invention
Double microprocessor techniques of recovered water, on the one hand greatly simplified existing processing technological flow, improve disposed of in its entirety technique
Treatment effect and efficiency；On the other hand, it instead of two-stage sedimentation oil removing because carrying out water-oil separating using micro- cyclone gas floatation device
Equipment, shorten effective residence time of processed sewage, while also can remove the dispersed oil and part oil emulsion in sewage, and it is big
The big floor space for saving equipment reduces operating cost more than 50%；It is follow-up to remove residual oil and residual solid particle
The filter type of impurity, finally can be by oil content average out to 147.7mg/L, suspended solids content because using microfilter device
Average 35.07mg/L processed recovered water, water outlet oil content is vestige after processing, suspended solids content is average≤1.0mg/
L, median particle size is average 0.946 μm, reaches oil field Extra-low permeability oil reservoir " 5.1.1 " (i.e.：Oil content≤5mg/L, suspend solid
Body content≤1mg/L, grain diameter intermediate value≤1 μm) requirement of reinjected water Water Quality Control Indexes, it is of the invention to use microfiltration technology,
Compared to the existing filtering accuracy that 1~2 order of magnitude is improved using sand filtration filtering technique（General sand filtration filtering accuracy about 2-5 μ
M, and the filtering accuracy of micro-filtration can reach below 1 μm of micron）；Also solve and used using film existing for hyperfiltration membrane assembly in addition
Short life, water flux decay is fast, the problem of the produce reality such as film regeneration difficulty.Therefore, micro- cyclone air-flotation and microfiltration technology
Use, disclosure satisfy that the effective exploitation of Periphery Oilfield Extra-low permeability oil reservoir, it is ensured that oil-polluted water whole re-injection after processing
Under, the further displacement of reservoir oil improves oil recovery factor, realizes the recycling of sewage and the Green Development in oil field.
Figure of description：
The double microprocessor process flow diagrams for being used to handle oil field extracted water of the present invention of accompanying drawing 1.
Embodiment：
The invention will be further described below in conjunction with the accompanying drawings and the specific embodiments：
As shown in figure 1, double microprocessor techniques for being used to handle oil field extracted water, comprise the following steps：
（1）Processed oil-containing recovered water relies on gravity（Or booster pump lifting）Entering cyclone air-flotation in a subtle way selects device to carry out water-oil separating
Dispersed oil and part oil emulsion and a small amount of granule foreign are removed, is selected entering cyclone air-flotation in a subtle way in the back with water inlet line of device while can
The recirculation water of floating agent and incorporation with microbubble is added, together enters cyclone air-flotation in a subtle way with processed sewage and selects device；
（2）Water outlet after the processing of micro- cyclone gas floatation device enters back into surge tank 1, and the boosted pump 1 of water of surge tank 1 enters in a subtle way
Filter；The micro-filtration is formed by buffering quenched, reaction unit and micro-filtration tank；The micro-filtration loaded in the micro-filtration tank
Medium carries out filtration treatment using active micropore ceramic coating filtrate；And active micropore ceramic coating filtrate K80≤1.2, compare table
Area reaches 13.6m2/g；Filter bed thickness reaches 3m inside micro-filtration tank, and the filtering accuracy of micro-filtration is below 1 μm of micron；In micro- mistake
Filter device successively completes the process of quenched, reaction and filtering, and quenched flocculation is added in the back with water inlet line enter people's microfilter device
Agent aluminium polychloride, the impurity particle in recovered water is set to flocculate to form larger cotton-shaped alumen ustum, so as to subsequently be had deep bed mistake
The absorption of active ceramic filtrate, the retention of filter feature remove, and the water outlet of microfilter device reaches oil field reinjection water Water Quality Control Indexes
Enter outer water delivery tank after it is required that, then boosted pump 3 enters water-injection station and carries out re-injection；
（3）The boosted pump 4 of water in outer water delivery tank is lifted to being loaded in the micro-filtration tank in microfilter device after a filter cycle
Filtrate carry out backwash regeneration, make the filtering that filtrate recovers original retention and adsorption capacity carries out next filter cycle；
In the backwash regenerative process for carrying out filtrate air water back washing is formed, it is necessary to gas caused by air compressor machine is incorporated into backwash
Wash water, so as to improve the regeneration effect of filtrate in micro-filtration tank；
（4）The backwashing sewage water of micro-filtration tank backwash regeneration discharge enters surge tank 2 in microfilter device, then boosted pump 5 carries
Rise cyclone air-flotation in a subtle way to select in the back with water inlet line of device, enter cyclone air-flotation in a subtle way and select device to be reprocessed；
（5）Oil slick slag caused by micro- cyclone gas floatation device progress water-oil separating enters oil slick slag ladle, is then lifted into through pump de-
Water station carries out dehydration reprocessing；The sludge that micro- cyclone gas floatation device bottom sedimentation separation comes out is concentrated after being discharged into sludge tank,
Then transport outward Treatment of Sludge station and do further harmless treatment and recycling.
Microfilter device is formed by buffering quenched, reaction unit and micro-filtration tank, and microfiltration media therein is micro- using activity
Hole ceramic coating filtrate carries out filtration treatment.And active micropore ceramic coating filtrate has larger specific surface area（Active micropore
Ceramic coating filtrate is to reach 13.6m using the uniform filtrate manually fired, K80≤1.2, specific surface area2/ g, it is quartz sand
More than 100 times, substantially increase its adsorption ability）With the ability of the impurity in efficient absorption sewage, along with filter tank
Portion uses deeper filter bed form（Filter bed thickness reaches 3m, is 3 times of walnut shell and quartz sand filter thickness, actually active filter
Journey is more than 5 times of quartz sand, improves filter effect）, so that microfiltration has higher pollutant carrying capacity and higher mistake
Filter precision（General about 2-5 μm of sand filtration filtering accuracy, the filtering accuracy of micro-filtration can reach less than 1 μm）；Additionally, due to use
Pulse gas and water joint backwash is born with favorable regeneration effect to active micropore ceramic coating filtrate and saves a large amount of recoils again
The characteristics of wash water.The follow-up filter type for removing residual oil and residual solid granule foreign is because use microfilter device, finally
Can be by oil content average out to 147.7mg/L, the average 35.07mg/L of suspended solids content processed recovered water, after processing
Water outlet oil content is vestige, suspended solids content is average≤1.0mg/L, and median particle size is average 0.946 μm, and it is hypotonic to reach oil field spy
Saturating rate oil reservoir " 5.1.1 " is (i.e.：Oil content≤5mg/L, suspended solids content≤1mg/L, grain diameter intermediate value≤1 μm) re-injection
The requirement of water Water Quality Control Indexes.
Water quality after microfilter device is handled can finally reach oilfield water flooding low-permeability or Extra-low permeability oil reservoir
The requirement of reinjected water Water Quality Control Indexes, then supplement formation depletion through water injection well re-injection underground and reach the mesh that the displacement of reservoir oil improves recovery ratio
, the environmental pollution caused by avoiding wastewater disposition is imposed a fine with economy, realizes effective processing and the resource of sewage of oil-polluted water
Change and utilize, it is ensured that the sewage whole re-injection underground after processing, further improve oil recovery factor, realize the Green Development in oil field.
Claims (7)
1. a kind of double microprocessor techniques for being used to handle oil field extracted water, comprise the following steps：
（1）Processed oil-containing recovered water is lifted into micro- cyclone gas floatation device by gravity or booster pump and carries out water-oil separating
Except dispersed oil and part oil emulsion and a small amount of granule foreign；
（2）Water outlet after the processing of micro- cyclone gas floatation device enters back into surge tank 1, and the boosted pump 1 of water of surge tank 1 enters in a subtle way
Filter, the quenched and process of reaction and filtering is successively completed in microfilter device；The water outlet of microfilter device reaches oil field
Enter outer water delivery tank after low-permeability or the requirement of Extra-low permeability oil reservoir reinjected water Water Quality Control Indexes, then boosted pump 3 enters
Water-injection station carries out re-injection；
（3）Step（2）The boosted pump 4 of water in outer water delivery tank is lifted to enter the filtrate in microfilter device after a filter cycle
Row backwash regeneration, make the filtering that filtrate recovers original retention and adsorption capacity carries out next filter cycle；
（4）Step（2）The backwashing sewage water of microfilter device discharge enters surge tank 2, then boosted pump 5 is lifted into micro- eddy flow
In the back with water inlet line of gas floatation device, enter cyclone air-flotation in a subtle way and select device to be reprocessed；
（5）Step（1）Oil slick slag caused by micro- cyclone gas floatation device progress water-oil separating enters oil slick slag ladle, is then lifted through pump
Dehydration reprocessing is carried out into dehydrating plant；The sludge that micro- cyclone gas floatation device bottom sedimentation separation comes out is carried out after being discharged into sludge tank
Concentration, then outward transport Treatment of Sludge station, which does further to handle, reaches innoxious and recycling.
A kind of 2. double microprocessor techniques for being used to handle oil field extracted water according to claim 1, it is characterised in that：Entering
Enter step（1）The backflow of floating agent and incorporation with microbubble can be added in the back with water inlet line of micro- cyclone gas floatation device simultaneously
Water, together enter cyclone air-flotation in a subtle way with processed sewage and select device.
A kind of 3. double microprocessor techniques for being used to handle oil field extracted water according to claim 1, it is characterised in that：Entering
Enter step（2）Quenched flocculant is added in the back with water inlet line of microfilter device, make the impurity particle in recovered water flocculate to be formed compared with
Big cotton-shaped alumen ustum, removed so as to be retained by the active ceramic filtrate with deep-bed filtration feature.
A kind of 4. double microprocessor techniques for being used to handle oil field extracted water according to claim 1, it is characterised in that：Step
（3）In the backwash regenerative process for carrying out filtrate, gas caused by air compressor machine is incorporated into backwash and forms air water back washing
Wash water.
A kind of 5. double microprocessor techniques for being used to handle oil field extracted water according to claim 1, it is characterised in that：Step
（3）Microfilter device is formed by buffering quenched, reaction unit and micro-filtration tank.
A kind of 6. double microprocessor techniques for being used to handle oil field extracted water according to claim 3, it is characterised in that：It is described
The microfiltration media loaded in micro-filtration tank carries out filtration treatment using active micropore ceramic coating filtrate；And active micropore ceramic coating
Filtrate K80≤1.2, specific surface area reach 13.6m2/g；Filter bed thickness reaches 3m inside micro-filtration tank, and the filtering accuracy of micro-filtration is 1 μ
Below m.
A kind of 7. double microprocessor techniques for being used to handle oil field extracted water according to claim 3, it is characterised in that：It is described
Quenched flocculant is aluminium polychloride.
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| CN111018251A (en) * | 2019-12-25 | 2020-04-17 | 大庆油田有限责任公司 | Advanced treatment system and treatment method for chemical flooding oilfield produced water |
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| CN111792809A (en) * | 2020-07-03 | 2020-10-20 | 中国石油天然气集团有限公司 | Oil-containing sludge advanced treatment process and treatment equipment |
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| CN114763280A (en) * | 2021-01-04 | 2022-07-19 | 中国石油化工股份有限公司 | Treatment process and system suitable for ultrahigh-salinity produced water |
| CN114455728A (en) * | 2021-01-05 | 2022-05-10 | 中海油能源发展股份有限公司 | Fine treatment system and method suitable for offshore oilfield production water |
| CN113003883A (en) * | 2021-03-16 | 2021-06-22 | 北京石油化工学院 | Refinery sewage treatment system |
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